Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873033 | Process for the production of hyperfiltration membranes | Klaus Heckmann, Georg Manecke, Beate Pfannenmuller, Klaus Ring | 1989-10-10 |
| 4865762 | Polymers which form liquid-crystalline phases | Willi Kreuder, Peter Neumann, Karl-Heinz Etzbach, Hans-Josef Sterzel | 1989-09-12 |